The Effect of Nonlinear Characteristics on Pneumatic Servo Systems

Lap Condition Effect on Sinusoidal Action

抄録

Pneumatic servo systems are used on fatigue machines and robots. Although, those systems have nonlinear elements which make the motion control difficult On the sinusoidal movements, the non-linearity of the servo valves, especially the lap conditionof the valves, is considered to cause a bad effect on the position control. We have already proposed a new method to measure thestatic characteristics of servo valves including the lap condition using an is othermal chamber. In this paper, firstly the lap condition of a servo valve is measured by the proposed method. Secondly, the effect of the lap condition of the servo valve during sinusoidal position control on a pneumatic cylinder is investigated. Finally, we compensate the effect of the lap condition of the valve using repetitive control.